A single-element frequency and radiation pattern reconfigurable antenna

A compact reconfigurable monopole slot antenna is presented in this paper. The antenna has two switches that are used to alter the surface current distribution and radiating edges on antenna, subsequently, the frequency and radiation pattern of the antenna. The baseline antenna configuration with switches in OFF state is single-band having -10 dB return loss bandwidth from 5.401 to 6.045 GHz and a broadside radiation pattern. The second configuration with switches in ON state allows dual-band operation in the 2.110-2.875 GHz and 5.665-5.968 GHz bands, combined with a redirected radiation pattern in the upper frequency band while maintaining a common impedance bandwidth with baseline configuration around 5.78 GHz. A good agreement is found between the simulation and measurement results.